Tripping mechanism for printing-machines.



- PATENTED MAY 3,1904.

G. F. READ. TRIPPING MECHANISM FOR PRINTING MACHINES.

3 SHEETS-SHEBT 1.-

APPLIQAT-ION FILED FEB. 11, 1903.

N0 MODEL.

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P ATENTED MAY 3, 1904.. G. F. READ.

APPLICATION FILED FEB, 11, 1903.

3 SHEETS-SHEET 3.

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TRIPPING MECHANISM FOR PRINTING MACHINES.

N0 MODEL.

ing drawings, forming a part of the same.

zen of the United States, residing at New York,

and-cylinder machines it is usual to separate there is provided a trip,-

and the tripping connections bywhich it s, operated are usually more or less complicated.

No. 758,689. Patented May 3,1904." X

UNFTFD STATES PATIENT! OFFICE.

Yemen, Assienon TO ROBERT HOE, oF

GEORGE F. READ, .OF NEW NEW YORK, N. .Y.

TRIPPING MECHANISM FOR PRINTING-MACHINES.

SPECIFICATION forming part-of Letters Patent 1.\To. 758,689, dated May 3, 1904.

Application filed February 11,1903, Serial No. 142,942. on 1110.161.)

ing the parts of the construction which are READ, a citinormally connected when the machine is in voperation. county of Kings, and State of New York, have j With this and other objects in viewthe ininvented certain new and useful Improvements vvention consists in certain constructions and in Tripping Mechanisms for Printing Main certain parts, improvements, and combinachines, fully described and represented in the tions, as will be hereinafter fully described and following specification and the accompany ,then specifically pointed out inthe claims hereunto appended. This invention relates to certain improve- In the accompanying drawings, Figure 1 is ments in printing-machines, v :a side elevation of so much of a bed-and-cyl- In certain types of printing-v machines inder printing-machine as is necessary to an such, for instance,as incertain kinds of bedunderstanding of the invention. Fig. 2 is a detail elevation, partly in section, showing the devices for operating the positioning mechanism in a difierent position from that shown in Fig. 1. Fig. 3 is an end view, partly in section, of the construction illustrated in Fig. ,2, the position of the observer being indicated ,by the arrow 3 in that figure. Fig. 4C is an ,elevation, partly in section, of the construction shown in Fig. 2, but showing the parts in still a different position. Fig. 5 is a plan view of the construction shown in Fig. 4:, certain of the parts being shown in section.

Referring tothe drawings,which illustrate one embodiment of the invention, 1 indicates the frame of a bed-and-cylinder machine, which frame may be of any desired construc- To all whmn it may concern; I Be itknown that I, Gruonen F.

the members of the couple afterthestroke of the reciprocation on whichthe printing is done and while the bed is completing its return stroke, In the constructions usually employed for this purpose the lifting'or positioning devices-are connectedto the ,eylinder and there is provided a rotating cam with suitableconnections which govern the operation of the positioning devices. These constructions usually' provide for permitting the. members of the couple under certain circumstances to remain separated for a greater or less period of time as, for instance, when the feeder misses a sheet or when the pressis being run for the purpose of inking upthis result being usually accomplished by interrupting the contion. It is provided :with standards 2, in which nection by whichthecam controls the mo ve- ;are mounted bearings 3, which serve to support 8 ment of the positioning devices, the interrupa shaft l of a cylinder 5. The reciprocating tion taking place when thecylinder is in its bed isconventionally indicated at 6. 1n the raised position. In the more usualconstrucconstruction illustrated'the separation of the tion the connection between the camand the members of the couple is effected by moving positioning device includes agab-hook, and the cylinder, and this is accomplished by pro- 8 5 :viding the cylinder with a positioning mechanism, which may be of any usual type. As shown, the bearings 3,which move on the usual .guides 7 in the frame, have connected to them mods-8, which pass through the bearings and 9 are secured in position by bolts 9 or in any other suitable manner. These rods, as is usual .in such constructions, pass through perforations in the frame. There are two pairs of these rods 8, each pair being connected by means of a block 10, which is arranged to move in guides 11, formed on the frame. The lower ends of the rods beneath theblocks may under the control of the pressman, which operates to lift the gabhook off its pin at the time it is desired to keep the members of the. couple separated, This gab-hook construction is not, however; readily adaptable to certain styles of machines,

The present invention has for its object to provide a means for controlling the position v ing devices of printing-machines which shall be cheap in construction, certain in operation, and which can be operated without disconnectbe provided with set-nuts 12, which determine the position of the blocks on the rods. In the construction shown the cylinder is raised at the proper time by the action of stiff springs, these springs being marked 13 and being arranged to surround rods 14,which are or may be provided with setnuts 15, against which the springs bear. As shown, the rods 14 pass through cross-bars in the frames and abut against the under side of the bearings 3. The ends of the springs opposite those which bear against the nuts 15 are arranged to bear against cross-webs on the frame. It is apparent that when the springs are not under tension they will operate to raise the cylinder, carrying the rods 8 up with them. IV hen, on the other hand, the rods 8 are drawn down, the springs will be compressed and the cylinder and bed will be brought into printing relation. It may. be remarked that the positioning mechanism so far described is a well-known construction, and any other suitable positioning mechanism may be substituted therefor.

The blocks 10, before referred to, serve to support a shaft 16, which extends across the machine from side to side. This shaft is provided on each side of the machine with an eccentric or crank portion 17, which is engaged by a bearing-block 18, this bearing-block being made concave on its under side, so as to position itself readily on the crank or eccentric portion. The upper ends of these bearingblocks are or may be provided with convex heads 19, which engage concave recesses 20 on the under side of the frame. It is apparent that when the shaft 16 is rocked in one direction the crank portions 17, operating through the bearing-blocks 18, will move the blocks 10 downward, thus moving the rods and the cylinder downward against the stress of the springs 13, the cylinder being thus brought into printing relation with the bed. When, however, the shaft 16 is rocked in the opposite direction, the springs 13 will be allowed to expand, thus causing the cylinder to move upward, the rods 8 and the blocks 10 moving upward with it. The rocking movement of the shaft may be produced by any desired form of actuating mechanism. In the construction shown one of the shafts of the machine, herein shown as the shaft marked 21, carries a grooved cam 22, said cam serving to operate an actuating-lever 23, which is pivoted at 2 1 to a frame of the machine. This lever 23 is provided witha bowl 25, which engages the groove in the cam 22, so that the lever has imparted to it movements which will rock the shaft at the proper times to effect the operations above referred to.

The connection between the actuating mechanism and the positioning devices of the machine is of such a character that the actuating devices may be thrown out of operation without disconnecting the connection either from the actuating mechanism or the positioning devices. To effect this,this connection is made collapsible-that is to say, it may be made ef fective or ineffective without breaking the connection itself or, as before indicated, without disconnectingit from the parts with which it is connected in operation. The form of this collapsible connection may be widely varied. In the construction shown the connection is jointed, and such a construction is the preferred one. While the particular form of jointed connection employed may also be widely varied, in the preferred form and as illustrated the jointed connection-will comprise two parts 26 and 27, the part 26 being pivoted at 28to the lever 23 and the part 27 being pivoted at 29 to an arm 30, which is fast on the shaft 16, before referred to. In the construction shown the part 27 is provided with a yoke 31, the end of the part 26 being secured between the arms of this yoke by means of a pivot or hinge-pin 32. It will be seen that the actuating-lever 23 thrusts this jointed member or connection in one direction and pulls it in the opposite direction and that these alternate thrusting and pulling motions operate to rock the shaft 16. Inthe preferred form of the construction the parts of the jointed member will be so arranged that the joint or pivot between the parts will be out of line with the line of thrust, so that there will be no tendency on the part of the jointed member or connection to break at the joint when the thrusting movement is being imparted to it, though it is obvious that the jointed member may be so constructed that the parts are not out of line during the thrusting movement. In the construction shown the pivot or joint of this member is located below the line of thrust, although it might under some circumstances be otherwise located. When the joint or pivot of the jointed member is out of line with the line of thrust, means are provided to limit the distance which the said joint or pivot can move out of this line. In the construction shown the member 26 is provided with a projection 33, which when the jointed member is in operative position bears against the end of the part 27, so that the end of the part 27 forms a stop for the projection. It will be understood, however, that the limiting means employed may be varied within wide limits.

When it is desired to interrupt the transmission of power from the actuating mechanism to the positioning devices, the connecting member, before referred to, is collapsed. 'lhe collapsing of this member may be effected by any suitable means, the form of which will be dependent upon the construction of the member itself. In the construction shown a lever is provided for this purpose, this lever being marked 34 and being mounted on a short shaft 35, which is or may be suitably journaled in the frame of the machine. The means by which the lever acts on the jointed connection may be varied. As shown, however, the lever is provided with a beveled block or cam 36, which cooperates with a projection extending from the jointed member. In the construction shown this projection is provided for by elongating the pivot 32. The means for operating the lever 34 may be varied within wide limits, but will preferably include a spring, for reasons which will hereinafter appear. In the construction shown the shaft has extending from it an arm 37, through a perforation in which passes a rod 38, said rod passing upward through an opening in the feed-board 39 and carrying on its upper end an enlargement or boss 40, which serves as a treadle-piece on which the pressman may put his foot. The rod 38 is surrounded by a spring 41, which bears against the arm 37 and against an adjustable collar 42, mounted on the rod 38, this rod 38 being prevented from being withdrawn from the aperture in the lever 37 by means of a collar 43. As is usual in such constructions, the rod 38 is provided with a pin 44, which may be caused to engage. under a latch 45, located on the footboard. It is of course understood that the cylinder should not be trippedthat is, the operation of the positioning mechanism should not be interrupted except when the cylinder is in its raised position.

The construction just described for operating the lever 34 enables the pressinan to .set the trip at any time during the operation of the machine; but the tripping operation can only take place at a timewhen the cylinder is in its raised position. Referring to Fig. 1, for instance, the cylinder is shown as raised and the bed is making its return movement, as indicated by the arrow. The pivot-pin 32 is opposite the cam-face 36, and if the pressman now steps upon the treadle-piece 40 the joint in the jointed member will be broken and the parts will be caused to assume the position shown in Fig. 2, it being understood that at this time the cam 22 is in such a position that the lever 23- is not applying any force to the jointed member. 22 is operating on the lever 23 and this lever is either thrusting or pulling on the jointed connection, the strain on the part is so great that even though. the cam 36 be under the pivot-pin the lever 34 cannot be operated to break the joint in the connection, because the spring 41 is so proportioned as to allow the rod 38 to be pushed'through the lever 37, so.

that the lever 34 is not operated and it will not be operated until the lever 23 has ceased to apply any force to the jointed connection. As soon, however, apply force to the jointed connection the spring 41 will operate the lever 34 and break the connection. If the pressman steps on the treadle-piece and operates the lever 34 at a time when the pivot-pin is not opposite the cam 36, the cam 36 will be interposed in the not to be restricted to this type When the cambers of the couple are as the lever 23 ceases tol path of the pin and may be retained there by causing the pin 44 to engage under the latch 45 on the foothoard. When in the further operation of the machine the pivot-pin 32 strikes the cam 36, the lever 34 will be depressed against the stress of the spring 41 and will remain depressed until, as before indicated, the lever 23 ceases to apply force to the jointed connection, at which time the stored energy in the spring 41 will cause the lever 34 to be operated and the connection 'to be broken.

While the weight of the parts will usually be found suflicient to cause the pivot of the jointed connection to pass below the line of thrust when the parts of ,the connection are straightened out, yet, if desired, an auxiliary means may be used to insure this action. As

shown,this means consists of a spring 46, which is connected to the part 26 and to a leverarm 47, which extends from the lever 23, the tendency of this spring being to depress the parts into the position shown in Fig. 1.

While the construction in which the invention is embodied has been shown as applied to a printing-machine of the bed-and-cylinder type, it is to be understood that the invention is applicable to constructions which applied to other types of machines. While, furthermore, the construction in which the invention is. embodied is shown as applied to machines in which the members of the couple are separated by moving the cylinder, it is of machines. It is also to be understood that changes and variations may be made in the constructions by which the invention is carried into effect, so that the invention is not to be limited to the precise construction hereinbefore described.

What is claimed isr 1. The combination with a printing-couple, of a positioning mechanism whereby the members of the couple are caused to be in and out of printing relation, an actuating mechanism, a collapsible connection between the positioning mechanism and the actuating mechanism,

and means for rendering said connection in-i operative,

substantially as described.

2. The combination with a printing-couple, of a positioning mechanism whereby the memcaused to be in and out of printing relation, acontinuously-operating actuating mechanism, a collapsible connection ,between the positioning mechanism and the actuating mechanism, and means for rendering said connection operative and inoperative,

substantially as described.

3. The combination with a printing-couple, of a positioning mechanism whereby the members of the couple are caused to be in and out ofprinting relation, an actuating mechanism,

may be a jointed connection between the positioning mechanism and the actuating mechanism, and means for breaking said connection to render it inoperative, substantially as descr bed.

4. The combination with a printing-couple, of a positioning mechanism whereby the members of the couple are caused to be in and out of'printing relation, acontinuously-operating actuating mechanism, a jointed connection between the positioning mechanism and the actuating mechanism, and means for breaking said connection to render it inoperative, substantially as described.

5. The combination with a printing-couple, of a positioning mechanism, a continuouslyrunning cam, operating means including a jointed connection between the cam and the positioning mechanism, and means for breaking the joint in said connection to render said connection inoperative, substantially as described.

6. The combination with a printing-couple, of a positioning mechanism, a continuouslyrunning cam, a lever moved thereby, a jointed connection between the lever and the positioning mechanism, and means for breaking the joint to render the connection inoperative, substantially as described.

7. The combination with a printing-couple, of a positioning mechanism whereby the members of the couple are caused to be in and out of printing relation, a jointed member for operating the positioning mechanism, actuating means for thrusting and returning the jointed member, the joint being out of line with the line of thrust, and means for breaking the joint to render said member inoperative, substantially as described.

8. The combination with a printing-couple, of a positioning mechanism whereby the members of the couple are caused to be in and out of printing relation, a jointed member for operating the positioning mechanism, an actuating-lever for thrusting and returning the jointed member, and a cam for operating the actuating-lever, the joint in the member being out of line with the points of attachment of said member to the lever and the positioning mechanism, and means for breaking the joint to render said member inoperative, substantially as described.

9. The combination with a printing-couple, of a positioning mechanism whereby the members of the couple are caused to be in and out of printing relation, a jointed member for operating the positioning mechanism, actuating means for thrusting and returning the jointed member, the joint in said member being out of line with the line of thrust, means for detel-mining the position of the joint, and means for breaking the joint to render said member inoperative, substantially as described.

10. The combination with a printing-couple, of a positioning mechanism whereby the members of the couple are caused to be in and out of printing relation, a jointed member comprising two parts pivoted together for operating the positioning mechanism, actuating means for thrusting and returning the jointed member,

members of the couple are caused to be in and I out of printing relation, an actuating mechanism, a jointed connection between the positioning mechanism and the actuating mechanism, and alever for breaking said connection to render it inoperative, substantially as described.

12. The combination with a printing-couple, of a positioning mechanism whereby the members of the couple are caused to be in and out of printing relation, an actuating mechanism, a jointed connection between the positioning mechanism and the actuating mechanism, a projection on the connection, a movable cam cooperating with the projection to break the joint in the jointed connection, and means for interposing the cam in the path of the projection, substantially as described.

13. The combination with a printing-couple, of a positioning mechanism whereby the members of the couple are caused to be in and out of printing relation, an actuating mechanism, a jointed connection between the positioning mechanism and the actuating mechanism, a lever carrying a cam for breaking said connection, and a projection on the connection for cooperating with the cam on the lever, substantially as described.

14. The combination with a printing-couple, of a positioning mechanism whereby the members of the couple are caused to be in and out of printing relation, an actuating-lever, a cam for operating the lever, a jointed member connecting the lever and the positioning mechanism, a pin carried by said member, a movable cam cooperating with the pin to break the joint in the jointed member, and means for moving the cam into and out of the path of the pin, substantially as described.

15. The combination with a printing-couple, of a positioning mechanism whereby the members of the couple are caused to be in and out of printing relation, an actuating-lever, a rotating cam for operating the lever, a jointed member connecting the lever and the positioning mechanism, a pin carried by said jointed member, and a lever carrying a cam for 0061)- erating With the pin to break the joint in said member, substantially as described.

16. The combination with a printing-couple, of a positioning mechanism whereby the members of the couple are caused to be in and out of printing relation, an actuating mechanism, a jointed connection between the positioning mechanism and the actuating mechanism, means for breaking the jointed connection, and actuating devices including a spring for operating said means, substantially as described.

17. The combination with a printing-couple, of a positioning mechanism whereby the members of the couple are caused to be in and out of printing relation, an actuating mechanism, a jointed connection between the positioning mechanism and the actuating mechanism, means comprising a projection and a cam for breaking the joint in said connection, and actuating devices including a spring for operating said means, substantially as described.

18. The combination with a printing-couple, of a positioning mechanism whereby the members of the couple are caused to be in and out of printing relation, an actuating mechanism, a jointed connection between the positioning mechanism and the actuating mechanism, a lever for breaking said connection to render it inoperative, and means including a spring for positioning said lever,substantially as described.

19. The combination with a printing-couple, of a positioning mechanism whereby the members of the couple are caused to be in and out of printing relation, an actuating mechanism, a jointed connection between the positioning mechanism and the actuating mechanism, a lever carrying a cam for breaking said connection, a projection on the connection for cooperating with the cam on the lever, and means including a spring for positioning said lever, substantially as described.

20. The combination with a printing-couple, of a positioning mechanism whereby the members of the couple are caused to be in and out of printing relation, an actuating-lever, a rotating cam for operating the lever, a jointed member connecting the lever and the positioning mechanism, a pin carried by said jointed member, a lever carrying a cam for cooperating with the pin to break the joint in said member, and means including a spring for positioning said last-mentioned lever, substantially as described.

In testimony whereof Ihave hereunto set my hand in thepresence of two subscribing witnesses.

GEORGE F. READ.

Witnesses: Y

F. W. H. CRANE, W. F. MORGAN. 

